isa.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
    1 /*-
    2  * Copyright (c) 1998 Doug Rabson
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/5.2/sys/i386/isa/isa.c 115703 2003-06-02 16:32:55Z obrien $");
   29 
   30 /*
   31  * Modifications for Intel architecture by Garrett A. Wollman.
   32  * Copyright 1998 Massachusetts Institute of Technology
   33  *
   34  * Permission to use, copy, modify, and distribute this software and
   35  * its documentation for any purpose and without fee is hereby
   36  * granted, provided that both the above copyright notice and this
   37  * permission notice appear in all copies, that both the above
   38  * copyright notice and this permission notice appear in all
   39  * supporting documentation, and that the name of M.I.T. not be used
   40  * in advertising or publicity pertaining to distribution of the
   41  * software without specific, written prior permission.  M.I.T. makes
   42  * no representations about the suitability of this software for any
   43  * purpose.  It is provided "as is" without express or implied
   44  * warranty.
   45  * 
   46  * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
   47  * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
   48  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   49  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
   50  * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   51  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   52  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   53  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   54  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   55  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   56  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   57  * SUCH DAMAGE.
   58  */
   59 
   60 #include <sys/param.h>
   61 #include <sys/bus.h>
   62 #include <sys/malloc.h>
   63 #include <machine/bus.h>
   64 #include <sys/rman.h>
   65 #ifdef PC98
   66 #include <sys/systm.h>
   67 #endif
   68 
   69 #include <machine/resource.h>
   70 
   71 #include <isa/isavar.h>
   72 #include <isa/isa_common.h>
   73 
   74 void
   75 isa_init(device_t dev)
   76 {
   77 }
   78 
   79 /*
   80  * This implementation simply passes the request up to the parent
   81  * bus, which in our case is the special i386 nexus, substituting any
   82  * configured values if the caller defaulted.  We can get away with
   83  * this because there is no special mapping for ISA resources on an Intel
   84  * platform.  When porting this code to another architecture, it may be
   85  * necessary to interpose a mapping layer here.
   86  */
   87 struct resource *
   88 isa_alloc_resource(device_t bus, device_t child, int type, int *rid,
   89                    u_long start, u_long end, u_long count, u_int flags)
   90 {
   91         /*
   92          * Consider adding a resource definition. We allow rid 0-1 for
   93          * irq and drq, 0-3 for memory and 0-7 for ports which is
   94          * sufficient for isapnp.
   95          */
   96         int passthrough = (device_get_parent(child) != bus);
   97         int isdefault = (start == 0UL && end == ~0UL);
   98         struct isa_device* idev = DEVTOISA(child);
   99         struct resource_list *rl = &idev->id_resources;
  100         struct resource_list_entry *rle;
  101         
  102         if (!passthrough && !isdefault) {
  103                 rle = resource_list_find(rl, type, *rid);
  104                 if (!rle) {
  105                         if (*rid < 0)
  106                                 return 0;
  107                         switch (type) {
  108                         case SYS_RES_IRQ:
  109                                 if (*rid >= ISA_NIRQ)
  110                                         return 0;
  111                                 break;
  112                         case SYS_RES_DRQ:
  113                                 if (*rid >= ISA_NDRQ)
  114                                         return 0;
  115                                 break;
  116                         case SYS_RES_MEMORY:
  117                                 if (*rid >= ISA_NMEM)
  118                                         return 0;
  119                                 break;
  120                         case SYS_RES_IOPORT:
  121                                 if (*rid >= ISA_NPORT)
  122                                         return 0;
  123                                 break;
  124                         default:
  125                                 return 0;
  126                         }
  127                         resource_list_add(rl, type, *rid, start, end, count);
  128                 }
  129         }
  130 
  131         return resource_list_alloc(rl, bus, child, type, rid,
  132                                    start, end, count, flags);
  133 }
  134 
  135 #ifdef PC98
  136 /*
  137  * Indirection support.  The type of bus_space_handle_t is
  138  * defined in sys/i386/include/bus_pc98.h.
  139  */
  140 struct resource *
  141 isa_alloc_resourcev(device_t child, int type, int *rid,
  142                     bus_addr_t *res, bus_size_t count, u_int flags)
  143 {
  144         struct isa_device* idev = DEVTOISA(child);
  145         struct resource_list *rl = &idev->id_resources;
  146 
  147         device_t        bus = device_get_parent(child);
  148         bus_addr_t      start;
  149         struct resource *re;
  150         struct resource **bsre;
  151         int             i, j, k, linear_cnt, ressz, bsrid;
  152 
  153         start = bus_get_resource_start(child, type, *rid);
  154 
  155         linear_cnt = count;
  156         ressz = 1;
  157         for (i = 1; i < count; ++i) {
  158                 if (res[i] != res[i - 1] + 1) {
  159                         if (i < linear_cnt)
  160                                 linear_cnt = i;
  161                         ++ressz;
  162                 }
  163         }
  164 
  165         re = isa_alloc_resource(bus, child, type, rid,
  166                                 start + res[0], start + res[linear_cnt - 1],
  167                                 linear_cnt, flags);
  168         if (re == NULL)
  169                 return NULL;
  170 
  171         bsre = malloc(sizeof (struct resource *) * ressz, M_DEVBUF, M_NOWAIT);
  172         if (bsre == NULL) {
  173                 resource_list_release(rl, bus, child, type, *rid, re);
  174                 return NULL;
  175         }
  176         bsre[0] = re;
  177 
  178         for (i = linear_cnt, k = 1; i < count; i = j, k++) {
  179                 for (j = i + 1; j < count; j++) {
  180                         if (res[j] != res[j - 1] + 1)
  181                                 break;
  182                 }
  183                 bsrid = *rid + k;
  184                 bsre[k] = isa_alloc_resource(bus, child, type, &bsrid,
  185                         start + res[i], start + res[j - 1], j - i, flags);
  186                 if (bsre[k] == NULL) {
  187                         for (k--; k >= 0; k--)
  188                                 resource_list_release(rl, bus, child, type,
  189                                                       *rid + k, bsre[k]);
  190                         free(bsre, M_DEVBUF);
  191                         return NULL;
  192                 }
  193         }
  194 
  195         re->r_bushandle->bsh_res = bsre;
  196         re->r_bushandle->bsh_ressz = ressz;
  197 
  198         return re;
  199 }
  200 
  201 int
  202 isa_load_resourcev(struct resource *re, bus_addr_t *res, bus_size_t count)
  203 {
  204         bus_addr_t      start;
  205         int             i;
  206 
  207         if (count > re->r_bushandle->bsh_maxiatsz) {
  208                 printf("isa_load_resourcev: map size too large\n");
  209                 return EINVAL;
  210         }
  211 
  212         start = rman_get_start(re);
  213         for (i = 0; i < re->r_bushandle->bsh_maxiatsz; i++) {
  214                 if (i < count)
  215                         re->r_bushandle->bsh_iat[i] = start + res[i];
  216                 else
  217                         re->r_bushandle->bsh_iat[i] = start;
  218         }
  219 
  220         re->r_bushandle->bsh_iatsz = count;
  221         re->r_bushandle->bsh_bam = re->r_bustag->bs_ra; /* relocate access */
  222 
  223         return 0;
  224 }
  225 #endif  /* PC98 */
  226 
  227 int
  228 isa_release_resource(device_t bus, device_t child, int type, int rid,
  229                      struct resource *r)
  230 {
  231         struct isa_device* idev = DEVTOISA(child);
  232         struct resource_list *rl = &idev->id_resources;
  233 #ifdef PC98
  234         /*
  235          * Indirection support.  The type of bus_space_handle_t is
  236          * defined in sys/i386/include/bus_pc98.h.
  237          */
  238         int     i;
  239 
  240         if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
  241                 for (i = 1; i < r->r_bushandle->bsh_ressz; i++)
  242                         resource_list_release(rl, bus, child, type, rid + i,
  243                                               r->r_bushandle->bsh_res[i]);
  244                 if (r->r_bushandle->bsh_res != NULL)
  245                         free(r->r_bushandle->bsh_res, M_DEVBUF);
  246         }
  247 #endif
  248         return resource_list_release(rl, bus, child, type, rid, r);
  249 }
  250 
  251 /*
  252  * We can't use the bus_generic_* versions of these methods because those
  253  * methods always pass the bus param as the requesting device, and we need
  254  * to pass the child (the i386 nexus knows about this and is prepared to
  255  * deal).
  256  */
  257 int
  258 isa_setup_intr(device_t bus, device_t child, struct resource *r, int flags,
  259                void (*ihand)(void *), void *arg, void **cookiep)
  260 {
  261         return (BUS_SETUP_INTR(device_get_parent(bus), child, r, flags,
  262                                ihand, arg, cookiep));
  263 }
  264 
  265 int
  266 isa_teardown_intr(device_t bus, device_t child, struct resource *r,
  267                   void *cookie)
  268 {
  269         return (BUS_TEARDOWN_INTR(device_get_parent(bus), child, r, cookie));
  270 }
Cache object: 7c776b5257f9318cae61ea48a53c2bf8
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.
FreeBSD/Linux Kernel Cross Reference sys/i386/isa/isa.c

FreeBSD/Linux Kernel Cross Reference
sys/i386/isa/isa.c
